// Sample code project: AVCam-iOS: Using AVFoundation to Capture Images and Movies
// Version: 5.0
//
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import AVFoundation
import UIKit

class PreviewView: UIView {
    var videoPreviewLayer: AVCaptureVideoPreviewLayer {
        guard let layer = layer as? AVCaptureVideoPreviewLayer else {
            fatalError(
                "Expected `AVCaptureVideoPreviewLayer` type for layer. Check PreviewView.layerClass implementation."
            )
        }
        layer.videoGravity = .resizeAspectFill
        return layer
    }

    var session: AVCaptureSession? {
        get {
            return videoPreviewLayer.session
        }
        set {
            videoPreviewLayer.session = newValue
        }
    }

    // MARK: Initialization

    override init(
        frame: CGRect
    ) {
        super.init(frame: frame)
    }

    required init?(
        coder aDecoder: NSCoder
    ) {
        super.init(coder: aDecoder)
    }

    // MARK: UIView

    override class var layerClass: AnyClass {
        return AVCaptureVideoPreviewLayer.self
    }

    override func layoutSubviews() {
        super.layoutSubviews()
    }
}
